AURUNA® 570 Gold Silver Electrolyte

Alkaline-cyanide gold alloy electrolyte – gold-saving

AURUNA® 570 is an alkaline-cyanide alloy electrolyte for depositing green-yellow gold coatings. The gold-silver alloy has a fineness of approx. 18 carats. The coatings are gold-saving, they are bright even as thick layers. For thin layers, a variant with a low gold content is available (AURUNA® 570 LC).

The long-term stable AURUNA® 570 electrolyte is easy to operate and suitable for rack and barrel. It is used for decorative applications.

Electrolyte characteristics

Electrolyte type

Alkaline-cyanide

Metal content

8 (7.5 - 8.5) g/l Au
3 (2.5 - 3.5) g/l Ag

pH value

> 11

Operating temperature

35 (30 - 40) °C

Current density range

1.0 (0.2 - 1.8) A/dm²

Plating speed

Approx. 0.6 μm/min at 1.0 A/dm²

Anode material

Stainless steel

Coating characteristics

Coating

Gold-silver

Alloy composition

75 wt. % Au
25 wt. % Ag

Colour of deposit

Green-yellow

Brightness

Bright

Hardness

115 HV

Max. coating thickness

> 10 μm

Density of the coating

Approx. 15.5 g/cm³

Advantages

  • Gold-saving 18 carat layers
  • Alkaline-cyanide gold alloy electrolyte
  • Free of cadmium
  • For decorative applications
  • Bright even as thick layers
  • Easy bath maintenance
  • The coatings are RoHS compliant
  • Suitable for rack and barrel

Applications

  • Jewellery
  • Watches
  • Spectacle frames
  • Writing implements
  • Lighting
  • Household articles
  • Cutlery
  • Accessories

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Questions about the product?

Markus Legeler

+49 7171 607 204

For inquiries and additional information
please contact

Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang
Germany

Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970
Email: chemistry@umicore.com
Website: www.chemistry.umicore.com

The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.